Improvement in boiler-flues



J. 'G. UARBINE. Boiler-Flues.

No. 217.338. Patented July 8,1879.

WITNESSES v NV [TORY ATTORNEYS N'FETERS, PHOTO-LITHUGRAFHER. WASHINGTON.D. C-

UNITED STATES PATENT OFFICE.

JOHN C. OABBINE, OF ATLANTA, GEORGIA.

IMPROVEMENT IN BOlLER-FLUES.

Specification forming part of Letters Patent No. 217,338, dated July 8,1879; application filed May 19, 1879.

To all whom it may concern.-

Be it known that I, JOHN G. GARBINE, of Atlanta, in the county ofFulton, and in the State of Georgia, have invented certain new anduseful Improvements in Boiler-Flues; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referto whichmyinvention appertains to make and use the same, I will now proceed todescribe its construction and operation, referring to the annexeddrawing, which fully represents my invention.

A represents a part of the head of a steamboiler for engines with flueB. This flue is represented as having been burned out at the end andrepaired by means of a ferrule or hollow plug, 0, tapering toward theoutside, as shown.

The old method of repairing the flue when the end becomes burned and theflue leaking is to plug up the flue with a solid plug, which renders theflue useless; or to take out the flue and repair it and put it back,which would take several days; but by my invention one workman with onehelper can repair five or six flues in one day, at less than one-tenththe cost of the old method of repairing flues.

Whenthe flue is burned out atthe end the ferrule or hollow plug 0 isdriven in. When thus driven in and the flange a turned down on theoutside of the head, and then properly corked, as would have to be donewith a repaired or new flue, it makes the flue as good as new andequally as water-tight and when the ferrule or hollow plug 0 becomesburned, as the ends of flues will after a time, the old plug can betaken out and a new one put in.

It will be understood that boiler-fines are always burned out or damagedat the ends, and such damage or injury to the flue naturally makes theinside of the flue tapering, it being reduced in thickness the most atthe end and gradually less and less inward. To repair such boiler-fluewithout taking it out it is necessary that the hollow plug or ferruleused in repairing must be correspondingly tapering, so as to form atight joint.

I am fully aware that hollow plugs inserted in the ends of boiler-finesis, broadly, not new, as they have been used in various ways withexpanding devices, and I do not, therefore, claim such, broadly, as myinvention.

In my invention the hollow plug or ferrule is made tapering on theoutside to correspond with the natural taper formed on the inside at theend of the boiler-flue when damaged by fire, so that no auxiliarydevices are needed to form a tight joint.

The ferrule or hollow plug O, being made tapering from the end of theoutside, can be driven into the flue so as to be perfectly-tight withoutany additional expanding or tightening devices.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

The hollow plug G, tapering on the outside, as shown,in combination withthe boiler-head A and the damaged end of a boiler-flue, B, which has acorresponding inner taper, whereby the flue is repaired and strengthenedand a perfectly tight joint made, substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this29th day of April, 1879.

his- JOHN O. X OARBINE.

mark.

Witnesses:

J AS. B. Wilson, MARTIN H. DOOLY.

